Add embedder-specific headers to HTTP CONNECT tunnel request

net/http/http_proxy_client_socket.h

Index: net/http/http_proxy_client_socket.h
diff --git a/net/http/http_proxy_client_socket.h b/net/http/http_proxy_client_socket.h
index a2682c505b111792d9a4f07cc5f7657023e93765..5c3d2a572b71e59a92775c29c51f60e37e5ccc86 100644
--- a/net/http/http_proxy_client_socket.h
+++ b/net/http/http_proxy_client_socket.h
@@ -28,6 +28,7 @@ class AddressList;
 class ClientSocketHandle;
 class GrowableIOBuffer;
 class HttpAuthCache;
+class HttpProxyTunnelDelegate;
 class HttpStream;
 class HttpStreamParser;
 class IOBuffer;
@@ -47,6 +48,7 @@ class HttpProxyClientSocket : public ProxyClientSocket {
                         bool tunnel,
                         bool using_spdy,
                         NextProto protocol_negotiated,
+                        HttpProxyTunnelDelegate* http_proxy_tunnel_delegate,
                         bool is_https_proxy);
 
   // On destruction Disconnect() is called.
@@ -163,6 +165,9 @@ class HttpProxyClientSocket : public ProxyClientSocket {
   bool redirect_has_load_timing_info_;
   LoadTimingInfo redirect_load_timing_info_;
 
+  const HostPortPair proxy_server_;
+  HttpProxyTunnelDelegate* http_proxy_tunnel_delegate_;
+
   const BoundNetLog net_log_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpProxyClientSocket);